Its a fairly simple in concept but execution is tricky. Basically you need to put one strip between the coils and posts, and another thin strip between coils and chimney case, then merge the two ends together to form short tails into the juice channels.
Lay a bit of the outer wick over the top of the coils before you put the chimney on, so it doesnt get pushed down, then tuck down after.
Also the chamber narrows after you put the chimney barrel section on, so you must push the coils back to ensure they dont short on the chimney, but leave enough room for the wick.